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Presentation transcript:

Start...

Small Gas Engine Disassembly

Presentation Outline: 1.0 Organization 2.0 Fuel 3.0 Sparkplug Removal 4.0 Draining Oil 5.0 Air Cleaner Removal

Presentation Outline Continued: 6.0 Blower Housing 7.0 Cylinder Head & Gasket 8.0 Fly Wheel Removal 9.0 Ignition Components 10.0 Carburetor & Governor

Presentation Outline Continued: 11.0 Valve Cover 12.0 Removal of Valves 13.0 Crank Case Cover 14.0 Cam Shaft Removal 15.0 Extract Valve Lifters

Presentation Outline Continued 16.0 Piston & Connecting Rod 17.0 Crankshaft Removal 18.0 Piston Ring Removal 19.0 Oil Seals 20.0 Remove Muffler

Organization Plastic bags Card board box Small cans Notes

Remove Engine from Implement Remove blades, belts, etc. Clean

Fuel Dump out gas Check fuel quality Look for water Dispose of properly

Sparkplug Check condition Oily, black soot Electrode - tan

Drain Oil Inspect condition Proper level Changed regularly

Air Cleaner Condition Changed regularly Wear parts 10 times faster

Blower Housing Engine ID numbers Remove debris Aids in cooling

Cylinder Head & Gasket Unbolt cylinder head Remove head gasket / inspect Inspect amt. carbon on piston Clean - warn, dirty - good

Flywheel Remove starter clutch Gear puller Examine fins, key, & key way Check flywheel for cracks

Ignition Components Remove condenser & points Check condition Remove magneto Remove electronic ignition

Carburetor & Governor Linkage Unhook linkages Draw picture, notes, label Small parts; plastic bag

Valve Cover Unbolt valve cover breather tube maintain crankcase vacuum

Remove Valves Valve spring compressor 2 big flathead screwdrivers Store springs with valves

Remove Crankcase Cover Remove rust from PTO shaft Tap to break gasket seal Remove any oil pumps / slingers

Remove Camshaft Locate timing marks Remove any oil pumps / slingers Inspect lobes for wear Wear indicates low oil

Remove Valve Lifters Exhaust lifter near threaded port Mark each lifter: tape, paint, grind

Remove Piston & Connecting Rod Punch marks, mating surfaces Unbolt connecting rod Push piston out through top

Remove Crankshaft Inspect journals Observe any thrust washers

Remove Piston Rings Remove piston rings Check ring gap Replace if necessary

Oil Seals Remove seals with screwdriver Replace if needed

Remove Muffler Penetrating oil Heat Oil filter wrench Flywheel strap wrench

The End.